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LT1963

Manufacturer: LT

500mA, Low Voltage, Very Low Dropout Linear Regulator

Partnumber Manufacturer Quantity Availability
LT1963 LT 125 In Stock

Description and Introduction

500mA, Low Voltage, Very Low Dropout Linear Regulator The LT1963 is a low dropout (LDO) regulator manufactured by Linear Technology (now part of Analog Devices). Here are its key specifications, descriptions, and features:

### **Specifications:**
- **Output Voltage Range:** 1.21V to 20V (adjustable) or fixed options (1.5V, 1.8V, 2.5V, 3.3V, 5V).  
- **Output Current:** 1.5A (guaranteed).  
- **Dropout Voltage:** 340mV (typical) at 1.5A load.  
- **Input Voltage Range:** 1.8V to 20V.  
- **Line Regulation:** 0.02% (typical).  
- **Load Regulation:** 0.05% (typical).  
- **Quiescent Current:** 1mA (typical) in operation, drops to <1µA in shutdown.  
- **Ripple Rejection:** 75dB (typical) at 1kHz.  
- **Operating Temperature Range:** -40°C to +125°C.  
- **Package Options:** TO-220, DD-Pak, SOT-223, and 8-lead SOIC.  

### **Descriptions:**
- The LT1963 is a high-performance LDO regulator designed for applications requiring low noise, high PSRR, and fast transient response.  
- It features low dropout voltage, making it suitable for battery-powered systems.  
- Includes protection features like current limiting, thermal shutdown, and reverse-battery protection.  

### **Features:**
- **Low Noise:** Optimized for noise-sensitive applications.  
- **High PSRR:** Excellent line and load transient rejection.  
- **Adjustable Output:** Can be set via external resistors.  
- **Fast Transient Response:** Maintains stability with minimal output capacitance.  
- **Protection Circuits:** Includes overcurrent and thermal shutdown.  
- **Wide Input Range:** Supports a broad range of input voltages.  

The LT1963 is commonly used in industrial, automotive, and portable electronics where stable, low-noise power is critical.  

(Note: Always refer to the official datasheet for detailed and updated specifications.)

Application Scenarios & Design Considerations

500mA, Low Voltage, Very Low Dropout Linear Regulator

Alternative Part Number

  • LM2941 --: Low-dropout adjustable linear regulator with similar current capability and adjustable output, widely available and pin-compatible in many designs.
  • MIC29152 --: 1.5A low-dropout regulator with adjustable output and low noise, a common substitute for LT1963 in power supply circuits.
  • TPS7A4700 --: Ultra-low-noise LDO regulator with adjustable output, suitable replacement when low noise and high PSRR are required.
  • LM2940CT-3.3 --: Widely available 3.3V low-dropout linear regulator in TO-220, a common substitute for LT1963 3.3V applications with similar dropout and current capability.
  • MC33269DT-3.3 --: Simple 3.3V LDO regulator in DPAK with comparable current rating, offering a cost-effective drop-in style alternative for LT1963 linear regulator designs.

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